Improved rocking-chair



lHENRY HURSILSEN., OF MANSFIELD, OHIO.

' Letters Patent No. 89,317, dated APM-l 27, 1869.

IMPROVED BOOKING-CHAIR.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, HENRY HURSH, Seu., ofMansfield, in the county of Richland, and State of Ohio, have inventedcertain new and useful Improvements in Rocking-Chairs; and I do herebydeclare that the following is a full, clear, and exact description of myinvention, reference being had to the accompanying drawings, forming apart of this specification, andv to the letters of reference markedthereon, of which drawings- Figure l is a side elevation of my improvedrockingchair.

Figure 2 is a plan of the same.

The nature of my invention consists in the extending of the rocker of arocking-chair up to nearly the top of the chair-back, in such a manneras to form a rocking-chair having a much greater compass of motion thanthe common rocking-chair, and which is free from any danger of rockingover, which is a common difficulty with other rocking-chairs.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construcbottoms of the posts A K, A K, andextend around and up to the posts A A, near the tops of the same, wherethey are secured by screws, or in any other suitable manner.

The shape of -these rockers is that of a compound curve, the firstportion, B, (extending from el to e, or between the bottoms of the legsor posts A K,) being curved to a circle, having its centre at a, whichpoint is about where the centre of gravity of' the chair and occupantwould be when the chair was in a nearly erect position.

The second part, C, of the rocker (extending from e to f,) is curved toa circle, having its centre at b, which point is somewhat above thecentre of gravity of chair and occupant, when in a reclining position,while 'the third part, D, (extending from f up to the post A,) is curvedto a circle, having its centre at c, which point is somewhat below thecentre of vgravity of chair and occupant, when the chair is rocked backuntil the top of the back touches the floor. y

It is readily seen, from this desoriptiom, that the occupant of thischair may rock back until the top of the chair-back touches the door,and that he cannot possibly rock over, as in other rocking-chairs, andfurther, that this chair has two sitting-curves to its rockers, the irsto1' sitting-curve B allowing a condition of neutral equilibrium to thechair and occupant, when in nearly an erect position; the second orreclining-curve C allowing a condition of stable equiibrium to chair andoccupant, in a reclining position; the closing or rolling'c'urve Dserving to complete the rocker, and from the position of its centre ofcurvature, to allow of the easy rocking of the chair through its wholecompass of motion.

The length of the reclining-curve C can be varied to suit the amount ofrange required inthe recumbent positions of the chair.

Having thus fully' described my invention,

Vhat I claim as new, and desire to secure by Letters Patent, is

A rocking-chair, constructed with rockers extending from the bottom ofthe front chair-legs, .under the bottom of the rear chair-legs, up to ornearly to the top of the chair-back, substantially as and for thepurpose specified.

As evidence that I claim the foregoing, I have here-v unto set my hand,in presence of two witnesses, this 20th day of February, A. D. 1869.

HENRY HURSH, SEN. Witnesses: Guo. A. OLUGsToN, JNO. K. STAMAX.

